Is lobster a member of the mussel family?

No, lobster is not a member of the mussel family. Lobster belongs to the order Decapoda, which includes crustaceans with ten legs, such as crabs, crayfish, and shrimp. Mussels, on the other hand, belong to the class Bivalvia, which includes mollusks with two shells, such as clams, oysters, and scallops.